$(function(){
	/*焦点切换*/	
	$(".ipt_text").focus(function(){
	var txt_value=$(this).val();
	if(txt_value==this.defaultValue){$(this).val("");}
	});
	
	$(".ipt_text").blur(function(){
	var txt_value=$(this).val();
	if(txt_value==""){$(this).val(this.defaultValue);}
	});
	/*展览讯息选项卡*/
	var exhibition_tab = $('.exhibition_tab span'),_this = $(this),exhibition_wen = $('.exhibition_wen .exhibition_a');
	$('.exhibition_wen .exhibition_a:gt(0)').hide();
	exhibition_tab.click(function(){
		$(this).addClass('current').siblings().removeClass('current');
		var index = exhibition_tab.index(this);
		exhibition_wen.eq(index).fadeIn().siblings().fadeOut();
		})
	})